Annual report pursuant to Section 13 and 15(d)

Goodwill and Other Intangible Assets - Intangible Assets Subject to Amortization (Details)

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Goodwill and Other Intangible Assets - Intangible Assets Subject to Amortization (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount $ 5,582 $ 5,426
Accumulated amortization (4,803) (4,471)
Net carrying amount $ 779 955
Weighted average useful life at time of acquisition 9 years  
Television Distribution Rights    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount $ 814 764
Accumulated amortization (751) (624)
Net carrying amount 63 140
Customer Relationships    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 3,334 3,319
Accumulated amortization (3,004) (2,891)
Net carrying amount 330 428
Other Intangible Assets    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 1,434 1,343
Accumulated amortization (1,048) (956)
Net carrying amount $ 386 $ 387